#!/usr/bin/env python
# -*- coding: utf-8 -*-

def fib(n):   # write Fibonacci series up to n
    a, b = 0, 1
    while b < n:
        print(b, end = ' ')
        a, b = b, a+b
    print()

def fib2(n):  # rturn Fibonacci series up to n
    result = []
    a, b = 0, 1
    while b < n:
        result.append(b)
        a, b = b, a+b
    return result

if __name__ == '__main__':
    import sys
    fib(int(sys.argv[1]))
